[INFO] cloning repository https://github.com/lperlaki/open_dam
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lperlaki/open_dam" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flperlaki%2Fopen_dam", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flperlaki%2Fopen_dam'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 171a5f0f5bf2b4c73d36ddb58cee00cd610ed2eb
[INFO] documenting lperlaki/open_dam against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flperlaki%2Fopen_dam" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lperlaki/open_dam on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lperlaki/open_dam
[INFO] finished tweaking git repo https://github.com/lperlaki/open_dam
[INFO] tweaked toml for git repo https://github.com/lperlaki/open_dam written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/lperlaki/open_dam already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48d228478ee5c45f3f274d300996f0eedc0a82c1250301e3facb13f9390cfc4e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "48d228478ee5c45f3f274d300996f0eedc0a82c1250301e3facb13f9390cfc4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48d228478ee5c45f3f274d300996f0eedc0a82c1250301e3facb13f9390cfc4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48d228478ee5c45f3f274d300996f0eedc0a82c1250301e3facb13f9390cfc4e", kill_on_drop: false }`
[INFO] [stdout] 48d228478ee5c45f3f274d300996f0eedc0a82c1250301e3facb13f9390cfc4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 25f8b1ecc5ee30064be1bdefb7849a3035e234e7419df52da24d003cbfd819bf
[INFO] running `Command { std: "docker" "start" "-a" "25f8b1ecc5ee30064be1bdefb7849a3035e234e7419df52da24d003cbfd819bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling ryu v1.0.1
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking open v1.3.2
[INFO] [stderr]     Checking checksum v0.2.1
[INFO] [stderr]     Checking rexif v0.3.6
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling libsqlite3-sys v0.16.0
[INFO] [stderr]    Compiling sys-info v0.5.8
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.5
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking png v0.15.0
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.13
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking rusqlite v0.20.0
[INFO] [stderr]    Compiling serde_derive v1.0.88
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]    Compiling structopt-derive v0.3.3
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking structopt v0.3.3
[INFO] [stderr]     Checking serde v1.0.101
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]  Documenting dam v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `dam`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name dam src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern checksum=/opt/rustwide/target/debug/deps/libchecksum-f98445f9e96f19a9.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-18e254b7473f37c5.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-2ef3fdf8373da2b7.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-91c2b32d0ceb9511.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-68a7decb82f54d26.rmeta --extern mime=/opt/rustwide/target/debug/deps/libmime-e444602e2e4fdfa5.rmeta --extern notify=/opt/rustwide/target/debug/deps/libnotify-a260e42d8dff2988.rmeta --extern open=/opt/rustwide/target/debug/deps/libopen-17d4a56d30370b7f.rmeta --extern rexif=/opt/rustwide/target/debug/deps/librexif-d622ad56b71c79a2.rmeta --extern rusqlite=/opt/rustwide/target/debug/deps/librusqlite-005c316032eb35c9.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-b68318284bb27088.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-de48779e6bffc136.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-1b474d0040a888cd.rmeta --extern sys_info=/opt/rustwide/target/debug/deps/libsys_info-5920968e1860510d.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-c1dfcc2d431858fe.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "25f8b1ecc5ee30064be1bdefb7849a3035e234e7419df52da24d003cbfd819bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25f8b1ecc5ee30064be1bdefb7849a3035e234e7419df52da24d003cbfd819bf", kill_on_drop: false }`
[INFO] [stdout] 25f8b1ecc5ee30064be1bdefb7849a3035e234e7419df52da24d003cbfd819bf